Comment by MuffinFlavored

https://github.com/macOScontainers/macos-jail - new code

https://github.com/macOScontainers/rund - new code

https://github.com/macOScontainers/moby - fork, 6 commits

https://github.com/macOScontainers/buildkit - fork, 4 commits

https://github.com/macOScontainers/containerd - fork, 5 commits

Would be interesting to see if they can get moby/buildkit/containerd changes upstreamed